include/net/gen_stats.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NET_GEN_STATS_H
   3 #define __NET_GEN_STATS_H
   4
   5 #include <linux/gen_stats.h>
   6 #include <linux/socket.h>
   7 #include <linux/rtnetlink.h>
   8 #include <linux/pkt_sched.h>
   9
  10 /* Throughput stats.
  11  * Must be initialized beforehand with gnet_stats_basic_sync_init().
  12  *
  13  * If no reads can ever occur parallel to writes (e.g. stack-allocated
  14  * bstats), then the internal stat values can be written to and read
  15  * from directly. Otherwise, use _bstats_set/update() for writes and
  16  * gnet_stats_add_basic() for reads.
  17  */
  18 struct gnet_stats_basic_sync {
  19         u64_stats_t bytes;
  20         u64_stats_t packets;
  21         struct u64_stats_sync syncp;
  22 } __aligned(2 * sizeof(u64));
  23
  24 struct net_rate_estimator;
  25
  26 struct gnet_dump {
  27         spinlock_t *      lock;
  28         struct sk_buff *  skb;
  29         struct nlattr *   tail;
  30
  31         /* Backward compatibility */
  32         int               compat_tc_stats;
  33         int               compat_xstats;
  34         int               padattr;
  35         void *            xstats;
  36         int               xstats_len;
  37         struct tc_stats   tc_stats;
  38 };
  39
  40 void gnet_stats_basic_sync_init(struct gnet_stats_basic_sync *b);
  41 int gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
  42                           struct gnet_dump *d, int padattr);
  43
  44 int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
  45                                  int tc_stats_type, int xstats_type,
  46                                  spinlock_t *lock, struct gnet_dump *d,
  47                                  int padattr);
  48
  49 int gnet_stats_copy_basic(struct gnet_dump *d,
  50                           struct gnet_stats_basic_sync __percpu *cpu,
  51                           struct gnet_stats_basic_sync *b, bool running);
  52 void gnet_stats_add_basic(struct gnet_stats_basic_sync *bstats,
  53                           struct gnet_stats_basic_sync __percpu *cpu,
  54                           struct gnet_stats_basic_sync *b, bool running);
  55 int gnet_stats_copy_basic_hw(struct gnet_dump *d,
  56                              struct gnet_stats_basic_sync __percpu *cpu,
  57                              struct gnet_stats_basic_sync *b, bool running);
  58 int gnet_stats_copy_rate_est(struct gnet_dump *d,
  59                              struct net_rate_estimator __rcu **ptr);
  60 int gnet_stats_copy_queue(struct gnet_dump *d,
  61                           struct gnet_stats_queue __percpu *cpu_q,
  62                           struct gnet_stats_queue *q, __u32 qlen);
  63 void gnet_stats_add_queue(struct gnet_stats_queue *qstats,
  64                           const struct gnet_stats_queue __percpu *cpu_q,
  65                           const struct gnet_stats_queue *q);
  66 int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);
  67
  68 int gnet_stats_finish_copy(struct gnet_dump *d);
  69
  70 int gen_new_estimator(struct gnet_stats_basic_sync *bstats,
  71                       struct gnet_stats_basic_sync __percpu *cpu_bstats,
  72                       struct net_rate_estimator __rcu **rate_est,
  73                       spinlock_t *lock,
  74                       bool running, struct nlattr *opt);
  75 void gen_kill_estimator(struct net_rate_estimator __rcu **ptr);
  76 int gen_replace_estimator(struct gnet_stats_basic_sync *bstats,
  77                           struct gnet_stats_basic_sync __percpu *cpu_bstats,
  78                           struct net_rate_estimator __rcu **ptr,
  79                           spinlock_t *lock,
  80                           bool running, struct nlattr *opt);
  81 bool gen_estimator_active(struct net_rate_estimator __rcu **ptr);
  82 bool gen_estimator_read(struct net_rate_estimator __rcu **ptr,
  83                         struct gnet_stats_rate_est64 *sample);
  84 #endif